Flushing device.



G. W. DARROW.

FLUSHING DEVICE. APPLICATION rn-nn JAH.2,1914.

Patented Aug. 4, 1914.

I 1/ III! Slave nib: q/vvhwooao /A Y CHARLES W. DABROW, OF GLENWOOD SPRINGS, COLORADO.

FLUSHING DEVICE.

Specification of Letters Patent.

Patented Aug. 4, 1914.

Application filed January 2, 1914. 4 Serial No. 809,968.

To alLwhom it may concern Be it known that I, CHARLES W. DARROW of Glenwood Springs, in the county of Garfield and State of Colorado, have invented certain new and useful Improvements in Flushing Devices; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it anpertains to make and use the same.

The objectof this invention is to provide a flushing device which will be simple, com

pact, durable, positive in action, noiseless in operation, and onewhich will close without shock.

In the accompanying drawing, Figure is a view in perspective. F ig. 2 is a vertical longitudinal sectional view showing the valve seated. Fig. 3 is a similar view showing the valve unseated. Fig. 4 is a perspective of the valve removed from the casing.

Referring to the drawings, 1 designates a shell or casing which is closed at one end by a screwed ca 2, and which end, for the purpose of this description, will be regarded as the lower. This casing has a water-chamber, an inlet branch 3 and an outlet branch 4 which latter are shown as being diametricallyopposite. The casing has an inner wall 5 which is in effect an inner prolongation of outlet 4, and in the lower or horizontal portion of this wall is a port which forms the passageway between the inlet and outlet. This port is located at the axial center of the casing. p

6 designates a balance valve which is in the form of a disk composed wholly of metal and has its seat against the wall of the central port which is reamed out for this purpose.

When seated the valve does not cover the inlet 3, but is located between the latter and the water chamber which is beneath such valve. The latter is subjected to water pressure on both sides. that is, its upper and lower faces, both when seated and unseated. The valve proper is shown as beveled to fit against the correspondingly beveled seat, and from this beveled portion extends a cylindrical prolongation'7 of slightly less cross sectional area than the central port. This cylindrical portion 7 is designed to throttle or materially cut oil the flow of water just before the disk valve reaches its seat. From this portion 7 extends a perforated sleeve 8 which terminates in an enlarged head 9 which is designedto fit in a recess through the disk-valve.

10 formed in the top of the casing. A passageway is found between the' Water-chamher and the outlet through the perforated sleeve, the opening in the latter extending Extending longitudinally through the sleeve and valve 6 is a push-rod 12 having at its outer end a cap or button and at its inner end an actuating valve 13 which centrally seats in the disk valve over the lower end of the opening therein. This actuating valve 13 is normally held togits seat by a small coiled spring 14 located within-a cage or bracket 15 securedgto the underside of the disk valve. When pressure is applied to the push rod to unseat valve 13, the water in the casing beneath the disk valve will pass up into sleeve 8 and into the outlet 4, through perforations 16 in said sleeve. A coiled spring 17 is employed to assist in the seating of the disk valve 6.

The inlet 3 is of considerably less cross sectional area than either the outlet 4 or the central port controlled by the disk valve. The water is throttled at the inner end of the inlet by a wall or diaphragm 18 having a central opening ofless diameter than the inlet proper, as clearly shown in Figs. 2 and 3.

In the casing 1 I form a ribbed by-pass 19 which extends from the inlet 3, at a point outside of the reducing wall or diaphragm 18 to a point at or near the outer or lower end of the water chamber beneath the disk valve. By reason of the diaphragm 18 the flow'of water is obstructed and there is thereby imparted to the water passing through the by-pass and into the casing on the under-side of the disk valve a greater pressure than that on its upper side, such pressure serving to force the disk valve to its seat and retain it there until dislodged by pressure applied to the actuating valve.

.A regulating cock 20 is shown as passing In practice, when pressure is applied to.

the knob of the actuating valve sufficient to overcome the tension of the spring 14 and the water pressure, the water beneath the disk valve will immediately discharge through the sleeve and the perforations 16, and the continued pressure on the knob will cause the unseating of'the disk: valve which, together with the actuating valve, is depressed to the full extent, being aided also by the water-pressure on the upper side of i the disk valve, as the water for flushing purposes passes above the valves through the central port to the outlet and thence to the bowl. Pressure on the push-rod being removed, the actuating valve will at once re seat and the disk valve will gradually return automatically to its seat by the conjoint action of the main spring and the inflow of water through the by-pass, which flow, as before stated, is under increased pressure due to the throttling at the inner end of the inlet, the water entering beneath th disk valve filling the water-chamber in overcoming the tendency of the valve to form a vacuum under the impetus of movement imparted by the recoil of the spring. The opening of the valves is substantially instantaneous, while the return of the disk valve is regulated by the force of the main spring and the extent of the throttling of the inlet. Under certain circumstances the main spring may be wholly omitted, while under others, the obstruction at the inner end of the inlet may be eliminated This question is determined by the quantity of water supplied. Under a eavy pressure the main spring is not required, since the pressure through the bypass is sufficient to insure the seatingof the disk valve. Under such circumstances, of course, the inner end of the inlet is throttled. When the pressure is comparatively low the main springis necessary, and under such circumstances it is not necessary to throttle the inlet.

The operation of this machine does not involve a question of greater. surface of valve subjected to water pressure on one side than on the other. The surfaces of the disk valve in this device exposed to water pressure are the same at all-times on both sides excepting when the disk valve is actually seated. When it is unseated there is greater water pressure on the lower side than on the other because of the increased pressure through the by-pass, while on the upper side of the valve there is a free and uninterrupted flow of the water since both the out let 4 and the central port are each of greater cross sectional area than the inlet, and this is true whether or not the latter be throttled at its inner end by the reason of the. presence of the reducing diaphragm 18. Thus less pressure exists on the upper side of the diskvalve at all times than on its lower side, while both sides present substantially the same surface area to the water. As the disk valve approaches its seat the cylindrical portion 7 enters and nearly fills the central port just before the disk valve reaches its seat. This is for the purpose of avoiding shock. The port is substantially closed without jar, there being no contact of parts, and what would otherwise be a jar resulting from the final closing of the port bythe seating of the disk valve is obviated by head 9 of sleeve 8 entering recess 10 which is filled with water or air or both, and the escape of which at the periphery of the head retards the seating of the valve sufliciently toallow it to reach its seat-gradually. By reason of the outlet and the central port being of greater area than the inlet opening the operation of the machine is rendered noiseless.

The advantages of my invention will be readily appreciated by those skilled in the art. A device so constructed may be operated in any position; is small and compact; can be taken apart without disarranging the plumbing; is composed of but comparatively few parts, and is not liable to readily get out of order or be deranged.

I claim as my invention:

1. A flushing device comprising a casing having a water-chamber, an inlet, an. outlet and a port intermediate said inlet and outlet, a balance valve for closin said port, said valve being in the form 0 a metallic disk havin at its center a cylindrical portion of slig tly less cross sectional area than said port and designed to extend through the latter before said valve is seated, said valve being subjected to water pressure on both sides both when seated and unseated, a bypass connecting said water-chamber with said inlet, a second valve controlling a passageway through, said balance valve between said Waterchamber and said outlet, a main spring in said water chamber for moving said balance valve to its seat, and a second spring for moving said second valve to its seat.

2. A flushing device comprising a casing having a water-chamber, an inlet, an outlet and a port intermediate said inlet and outlet, a balance valve for closing said port, said valw being in the formof a metallic disk having at its center a cylindrical portion of valve is seated, said valve being subjected to water pressure on both sides both when seated and unseated, a cylindrical sleeve carried by said cylindrical portion and having its outer end formed with a cushioning head, said casing having a recess into which said head is designed to move as said balance valve is moved toward its seat, an actuating valve for controlling a passagewa from said water-chamber through said balance valve to said outlet, and a by-pass connecting said water-chamber with said inlet.

3. A flushing device comprising a casing having a water-chamber, an inlet, an outlet and a port intermediate said inlet and outlet, said inlet being throttled or reducedat its inner end, and said casing having a recess in line with said port, a balance valve for closing said port, said valve being in the form of ametallic disk having a cylindrical portion designed to extend through said port, a sleeve carried by said cylindrical portion and having a cushioning head designed to moveinto said recess as said balance valve is moved toward its seat, an actuating valve for controlling a passageway between said waterchamber and said outlet through said balance valve and said sleeve, and a by-pass connecting said water-chamber with said inlet at a point outside of the throttled portion thereof.

4. A flushing device comprising a casing having a water-chamber, an inlet, an outlet and a port intermediate said inlet and outlet, said inlet being throttled or reduced at its inner end and said outlet and said port being of greater cross sectional areas than said inlet, said casing having a recess in line with said port, a balance valve subjected to water pressure on both sides both when seated and unseated, said valve being in the form of a metallic disk having a cylindrical portion designed to extend through said port, a sleeve carried by said cylindrical portion and having a cushioning head designed to move into said recess as said balance valve is moved toward its seat, said sleeve having perforations forming continuations of a passageway through said valve connecting said water-chamber with said outlet, an

actuating valve designed to close said passageway, a spring carried by said balance valve for holding'said actuating valve to its seat, a main spring in said Water-chamber acting against said balance valve, and a bypass connecting said water-chamber with said inlet at a point outside the point at t which said inlet is throttled.

In testimony whereof, I have signed this specification in the presence of two subscribing witnesses.

CHARLES WV. DARROWV.

Witnesses:

FRANCIS S. MAGUIRE, J. NOTA MCGILL. 

